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地震 ›› 2002, Vol. 22 ›› Issue (2): 42-46.

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7级大震和中强震的前兆异常有本质区别吗?

韩渭宾, 任越霞   

  1. 四川省地震局,四川成都 610041
  • 收稿日期:2001-06-25 修回日期:2001-09-14 出版日期:2002-04-30 发布日期:2021-12-21
  • 作者简介:韩渭宾(1941-),男,江苏太仓人,研究员,主要从事地震学及地震预报等研究。
  • 基金资助:
    “九五”国家重点科技攻关项目(96-913-09-02)

Are thereessential differences for precursory anomalies between strong earthquakes with M≥ 7 and moderate earthquakes?

HAN Wei-bin, REN Yue-xia   

  1. Seismological Bureau of Sichuan Province, Chengdu 610041, China
  • Received:2001-06-25 Revised:2001-09-14 Online:2002-04-30 Published:2021-12-21

摘要: 据震前次一等地震活动增强、空区和条带等地震活动图像, 以及各学科前兆异常持续时间和空间分布等方面, 比较了7级强震和中强震的前兆异常特征。结论是没有质的区别, 但在量上有明显的差异。文中分别对7级强震前5级、6级地震活动增强, 和6级地震前4级、5级地震活动增强, 选择了时空阈值和预报规则, 进行了预报评分检验, 得到了肯定的结论。

关键词: 7级大震, 中强地震, 前兆异常, 本质区别

Abstract: In this paper, the differences of precursory anomalies between strong earthquakes with M≥ 7 and moderate earthquakes with M= 5~ 6 were com pared and analyzed. The results indicate that there are not anyessential differences, but obvious quantitative differences between them. Prediction efficacies for increase of seismicity with M5~ 6 before an earthquake with M≥ 7 and increase of seismicity with M4~ 5 before and earthquake with m= 5~ 6 were also statistically examined and were passed, respectively.

Key words: Strong earthquake with M𢙗, Moderate earthquake, Precursor anbsurface, essential difference

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